Improved Interpretation of Stark Broadening Data from Detached Divertor Plasmas

摘要: Stark broadening analysis of high‐n Balmer series transitions (n=10→2) is benchmarked against electron density measurements from a Thomson scattering system in the divertor region DIII‐D tokamak. The time‐averaged data show ne = 6.0±0.5×1020 m−3 low Te (∼1 eV) detached plasma. Analysis measured broadened line widths using conventional theory gives 6.7±1.3×1020 m−3. A more advanced technique, which referred to here as generalized and includes additional effects related dynamics ion electric field [E. Oks, Broadening Hydrogen Hydrogenlike Spectral Lines Plasmas: Physical Insight, Alpha Science International, Oxford, UK, 2006], was also applied produces 5.3 ± 0.5 × 1020 In addition, temperature information ≈ 1 eV determined (conventional does not allow for dependence). improved diagnostic results suggest that...